confessions of a rocket scientist

[@TheLe016]

Legend has it that the slide rule he threw at the satellite gently adjusted its final trajectory into the Sun...

[@357Shakey]

This video is totally boss! I had a friend who brought his dad's HP-41C to our high school in the late 70's. We were amazed at a calculator that read magnetic strips. Now I have an 11C (originally bought in 1983 for engineering school), a mint 32SII, a 42S (my favorite) and a new 15C Limited Edition. Think what this guy could have done with those in the 60's and 70's! PS - guys like the presenter of this video built the Hoover Dam and sent man to the moon - using slide rules. Kick ass!

[@petermikus2363]

Also if you like the hp 42s you might be interested in the swiss micross dm42 it is a rebbot of the 42s from i diffrent company it is a extremly well done reboot also using the free42 software has a bigger screen that shows all 4 stacks is faster and has separate keys for the menu selection it is also regarded as one if not the most prrcise pocket calculator also it is about the same size as the 42s they keys arent as good but still really good

[@Leutchik]

Long live HP and RPN.

[@clearsailing7993]

The engineer who taught me gear design had been doing it for 45 years. He also used slide rules and look up tables. But he also talked about a mechanical calculator called a Friden. It was like a big typewriter. To do a square root on it was a whole involved procedure. It had way more precision than the slide rule. For gearing we worked with eight places to the right of the decimal. I am so grateful for all that man taught me. Thank you Glen. I had one 41c, one 41cv, three 41cx, three 48, one 50g, two 35s, two primes. My favorites were the 41cx and the 50g. I was definitely a fan of RPN and HP calculators.

[@qdav5]

Bought my first HP calculator in 1985 and have been hooked ever since! I've only owned two, though: my HP 41CV gave up the ghost after about 12 years of hard use and I replaced it with an HP 48GX, which is still going strong.

[@netsurferx1]

Nice collection! I've recently snagged a HP-41CX & a HP-15C. Awesome, awesome machines! This is my first real dealings with RPN, & I'm finally starting to get the hang of it.

[@izzyAKAisra]

Dude you should make more videos regarding your experiences as an engineer.

[@DennisMathias]

I agree!

[@hank1519]

A wonderful trip down calculations memory lane! Thank you!

[@bigrevmedia]

This was amazing! Thanks for sharing, and really cool you held onto all that stuff!

[@CurtCameron]

Nice story. I still use my 41C, the original model, made in 1981. Still works perfectly.

[@ffggddss]

That had to be one of the ones made to prevent synthetic programming, which the first edition (1979) could be made to do.

[@MobileMood]

Have a 41CV myself. Wonderful device. Used both a 41CV and 11C in high school. :)

[@tyredd7708]

People grew up with a Slide Rules know more about math than people grew up with a calculator.

[@N108funshow]

I hope you’re doing well. Thanks for everything you’ve done.

[@gabegarcia6425]

Thanks for sharing this video. I have a great deal of respect for people like you who have worked towards exploring space. I hope that in my lifetime I get to see manned space missions like your generation did.

[@CamdenBloke]

The quality has really gone downhill on HP calcs in recent years. I'm sure some of them are faster strictly speaking, but you can have my HP 32SII when you prise is from my cold dead hands.

[@engineer360]

I found your video about previous Hp calculators both useful and informative. I use the hp35s calculator. It is a great addition as a tool for a mechanical engineer.

[@guidichris]

Great video!! I can still use a slide rule. I am of the opinion the HP 41 series were the best calculators ever made.

[@CristiNeagu]

2:09 I never could agree with that statement considering textbook entry is a thing. I understand that RPN comes more naturally to someone that has been using it for decades, but it is definitely not irreplaceable.

[@JohannSwart_JWS]

I can relate to that. Owned and used a slide rule, HP33E, HP33C, HP11C, HP41CX, HP48GX, HP15C LE and soon a HP Prime. Love the old ones though. Build quality!

[@DennisMathias]

John, haven't bought a calculator in years. I know they say they are pase' but I just couldn't resist. Ordered a Prime.

[@gabrieljcs11]

Fantastic. Please, make more videos.

[@centar2001]

HP 35s, my 1st HP RPN calculator and it rocks!

[@nukedude]

I agree, make more videos about missiles and rockets.

[@Dracanic]

@arenics it uses Reverse Polish Notation. something im learning to do now after talking to a physicist i know. he says "bite the bullet and learn the notation, math will come faster and you will make fewer mistakes. Algebraic calculators leave too much room for mistakes and do you a disservice to learning math. It will keep you focused on the order of operations and your equations will make more sense." So im looking at getting an HP.

[@robertlozyniak3661]

Just remember not to overflow the stack. Most of these calculators have only 4 stack levels.

[@deadrabbit666666]

I have heard the 35s looks like the early pioneer calculators but does not function as well. I have a 50g and a 42s myself and am content with them.

[@chef1arjunaidi]

Brilliant video! precisely why I will never use a non-HP calculator unless it is an RPN machine. OK, I confess I have a couple of Texas Instruments but they are vastly inferior to the HP.

[@DrBPhD]

@nelipotfootfree Maybe that's exactly what they mean. Mine is in a cupboard ("on" key close to defective, occasional missing of keystrokes) and I started using my 41 CV and 48G again.

[@sergiobruschi4698]

I use my HP 42S every days and is it useful and work perfectly!

[@petermikus2363]

The swiss micros dm 42 is a reboot of thay calculator somewhat but a better in some aspects tho the keys pack a bit however i would say that their keys are the second best after hp

[@uriituw]

Thanks for posting this. It's very interesting and informative.

[@Membrane556]

Didn't the HP 35 fly on the Skylab and ASTP missions?

[@arenics]

how this "calculator rule" does works ? how is it used ? I'm engineering student and I never see one of that before...

[@IExSet]

HP betrayed RPL and RPN :-(

[@abelincoln7473]

Wow , K&E slide rule, havent seen one of those in a while.

[@bill605able]

Yes, I crave a deci lon ten.

[@nelipotfootfree]

Those of you who say that HP's quality has gone downhill in recent years, try the new HP 35s.

[@deltaexplorer47]

Learning RPN .. . not easy; however, if he says is the best then I have to learn it

[@DennisMathias]

It's EASIER once you marry it.

[@peocaveo]

the best calculator is the one we have under our hair...

[@mrtriac3024]

But not as fast as a scientific calculator, though...

[@powder-phun949]

Not really for rocket science

[@mzaphod64]

Wow, that's so cute

[@nelipotfootfree]

Thank you sir!

[@axiomist1076]

What a fun life !

[@2adamast]

And the spreadsheet made the calculator absolute?

[@ffggddss]

You mean, "obsolete." There's a *big* difference!

[@xoio]

BOSS!

[@nxtyrjrslm]

You are correct HP+rnP

[@killabilla]

rocket science is so hard

[@Vermiliontea]

@deadrabbit666666 The HP 35S is not a RPL-system calculator. It's kinda primitive, more like HP's old programmable calculators, before the RPL-families: HP 28, HP 48, HP 49/50. I could never go back to that. I almost exclusively use and depend on my own custom functions, which I access from custom menues. Only a masochist would deal with the old register type of memory management. And only a masochist would deal with algebraic calculators, Thus there is only the HP 50G today.

[@senorneutral8846]

Are you Alive?

[@DudeOfDiamonds]

1:03 He's black!?

[@ffggddss]

And pixel-scrambled, to boot!